Boiler



(No Model.) 2 Sheets-Sheet 1;

T. SEEVERS.

BOILER. 7 No. 340,827. Patented Apr. 27, 1886.

wi-tneaoeo 'uewtoz .Acvers N, PEYERS. PhomLilhugrapher, Washinglon. o. c.

UNITED STATES PATENT OFFICE.

THOMAS SEEVERS, OF OSKALOOSA, IOlVA.

BOILER.

Application filed January 8, 1586. Serial No. 1B.012.

To all whom, it may concern:

Be it known that I, THOMAS SEEvERs, a citizen of the United States, residing at Oskaloosa, in the county of Mahaska and State of Iowa, have invented a new and useful Improvement in Boilers, of which the following is a specification, reference being bad to the accompanying drawings. 1

My invention relates to an improvement in baseburning magazine steam'boilers; and it consists in the peculiar construction and combination of devices, that will bemore fully set forth hereinafter, and particularly pointed out in the claim.

In the drawings, Figure 1 is a vertical central sectional view of my invention. Fig. 2 is a similar view of the same, taken on a plane at right angles to Fig. 1. Fig. 3 is a horizontal section taken on the line 5c :0 of Fig. 1. Fig. 4 is an elevation of a boiler, the inclosing brick-work being omitted.

A represents the cylindrical outer shell of the boiler, and B represents a steam-dome, which is ofless diameter than the boiler, and is located on the upper end thereof.

C represents the fuel magazine, which is located centrally in the outer shell, and is shaped like the section of a cone, the lower end of the magazine being larger than the up per end thereof. The crown sheet D of the magazine is connected to the upper side of the steamdome by means of a rod, E, and clamping nuts, which are screwed onto the upperaud lower ends of the said rod.

F represents the lire-box at the lower end of the magazine, and also located ceutrall y in the shell A, at the lower end thereof. This fire-box is of greater diameter thanthe lower end of the magazine, and the walls of the said fire-box are inclined and converge toward the lower end thereof, the said fire-box being thus made smaller at its lower end than at its upper end. A coal chute, G, communicates, near the upper end of the magazine, on the front side thereof, with the outer shell of boiler A, and to the outer end of this chute is hinged a door, H.

I represents a series of smoke-Hues, which connect the upper side of the fire-box and the upper end of the boiler, around the magazine, the said lines almost entirely surrounding the FJLGATION forming part of Letters Patent No. 340,827, dated April 27, 1886,

(No model.)

magazine. By this construction a space, Z. is left in the boiler, which entirely surrounds the fire-box and the magazine, .so as to bring the water in direct contact with the heated parts of the furnace, and through this waterspace pass the heated fines, whereby steam may be generated very rapidly and with a 1niuimum consumption of fuel.

A door, K, communicates with the fire-box, and the said firebox is provided with the shaking-grate L. A lever, M, is fulcrnmed on the outer side of the furnace, and is connected to the grate L, by which means the grate may be shaken, so as to agitate the bu in ing coal. An ash-pit, M, is formed below the fire-box, and is provided with a door, N, which door regulates the draft.

The boiler is incased in brick work, 0, as shown in Figs. 1, 2, and 3, and the said briclc work is formed with a flue, 1, which surrounds the boiler, has a chimney, R, and is provided with suitable openings and doors, by means of which the soot may be removed and access gained to the lower end of the boiler, in order to remove the sediment therefrom through the man-holes S.

T represents a horizontal iron partitionplate, which is secured to the upper end of the boiler, and divides the flue 1? into an up per chamber, V, and a lower chamber, \V. This partitionplate is cut away at its front side, to form openings Y, communicating with the chambers V and \V.

To the steam-dome is secured a pipe, a, which communicates at its outer end with a pressurevalve, 1), which is adapted to raise and lower a weighted lever, c, similarly to the ordinary safety-valve. The short end of the lever c is connected to the free lower side of the door N by means of the chain (1. Vhcn the pressure of the steam becomes too great for safety,the outer end of the lever c is raised, which causes the short end thereof to lower, and thereby close the door N and cut off the draft to the fire. As the pressure of steam is decreased, the short end of the lever c rises, and thereby opens the door N to admit air to the fire, thus regulating the draft automatically.

- The smoke and products of combustion pass upwardly from the fire-box through the does 1 into the chamber or flue V, which surrounds the steam-dome, so as to superheat the steam therein, and from thence through the openings Y down into the flue or chamber VV, and from thence up through the chimney.

Having described my invention, I claim The boiler com prising the vertical shell A, the Steanrdmne, of less diameter, on the upper end thereof, the magazine and fire-box located in the boiler, the said magazine being largest at its lower end, and the said fire-box being largest at its upper end, the ilues I from the lire-box and extending through the upper end of the boiler, and the casing O, surrounding the boiler and having the upper chamber,

THOMAS sEnVERs.

XVitnesses: J AMES CARROLL, DANIEL DAVIS. 

